The frequency or intensity of the whistle of an approaching train increase, due to which phenomenon?
The frequency or intensity of the whistle of an approaching train increases due to the Doppler Effect. This phenomenon occurs because as the train moves towards an observer, the sound waves it emits are compressed, resulting in a higher frequency and intensity perceived by the observer. Conversely, as the train moves away, the sound waves are stretched, causing a decrease in perceived frequency and intensity.
Share
The frequency or intensity of the whistle of an approaching train increases due to the Doppler Effect. This phenomenon describes how the perceived frequency of sound changes depending on the relative motion between the source (the train) and the observer. As the train moves towards the observer, each sound wave is emitted closer together, leading to a higher perceived frequency and intensity. Conversely, when the train moves away, the waves are stretched out, resulting in a lower perceived frequency and intensity. This effect is crucial for various applications, including radar systems, astronomy (studying celestial objects’ motion), and everyday scenarios like understanding approaching vehicles’ speeds based on their sound. Charles’s Law relates to the behavior of gases concerning temperature and volume, Archimedes’ Law to buoyancy, and the Big Bang Theory to the origin and evolution of the universe, none of which directly explain the observed phenomenon of increasing whistle frequency from an approaching train.